Lee, Je Seung Ko, Nan Hee Bae, Hyun Woo Nguyen, Dinh Quan Lee, Hyunjoo Choi, Dai Ki Cheong, Minserk Kim, Hoon Sik 2024-01-20T23:31:37Z 2024-01-20T23:31:37Z 2021-09-03 2008-04-10 0376-7388 https://pubs.kist.re.kr/handle/201004/133556 Zwitterionic imidazolium compounds containing a propylsulfonate group and an ester group at 1- or 2-position were prepared and used as the membrane materials for separating ethylene/ethane and propylene/propane mixtures. The performance of the membranes consisting of a silver salt and a zwitterionic imidazolium compound bearing an ester group was significantly affected by the location of the ester group on the imidazolium ring. The investigation of the interaction between a zwitterionic imidazolium compound and AgNO3 using the density functional theory method and FT-IR study shows that the silver ion bonded to propylsulfonate group interacts intra-molecularly with the ester group only when both ester and propylsulfortate groups are located on the same side of the imidazolium ring. (C) 2008 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV FACILITATED OLEFIN TRANSPORT NUCLEAR-MAGNETIC-RESONANCE FOCK-SLATER CALCULATIONS ION-EXCHANGE MEMBRANES SILVER SALTS NUMERICAL-INTEGRATION APPROXIMATION BEHAVIOR ENERGY ELECTROLYTES Effect of ester group on the performance of zwitterionic imidazolium compounds as membrane materials for separating alkene/alkane mixtures Article 10.1016/j.memsci.2008.01.026 1 JOURNAL OF MEMBRANE SCIENCE, v.313, no.1-2, pp.344 - 352 JOURNAL OF MEMBRANE SCIENCE 313 1-2 344 352 scie scopus 000255208900035 2-s2.0-40849151850 Engineering, Chemical Polymer Science Engineering Polymer Science Article FACILITATED OLEFIN TRANSPORT NUCLEAR-MAGNETIC-RESONANCE FOCK-SLATER CALCULATIONS ION-EXCHANGE MEMBRANES SILVER SALTS NUMERICAL-INTEGRATION APPROXIMATION BEHAVIOR ENERGY ELECTROLYTES ionic liquids membranes zwitterionic compounds facilitated alkene transport ionomer